Anvil for stapling machines



Y B S O R C A. S

Filed March 7, l1955 INVENTOR ATTORNEY Patented Mar. 16, 1937 PATENT ANVIL FOR STAPLING MACHINES Stephen A. Crosby, New York, N. Y., assigner to Parrot Speed Fastener Corporation, New York, N. Y., a corporation of New York Application March 7, 1935, Serial No. 9,710

25 Claims.

The present invention relates to stapling ma- 'chines and more particularly tov machines employing a shiftable anvil having a plurality of types of relatively elongated clinching indentations se- 5 lectively utilized in deforming successive staples of a staple strip for either permanent or temporary fastening purposes.

One object of the 'invention is to provide in a stapling machine of the character referred to an l improved shiftable anvil `adapted to be convenl thereof may be readily manipulated by relatively slight nger pressure on the part of the operator lfor setting the anvil for either temporary or per- 25 manent fastening of a staple.

f The invention has as another object the provision of a stapling machine wherein the anvil isslidably shifted by relatively light finger pressure on the part of the operator and wherein the anvil during displacement thereof longitudinally of the base of the machine actuates a transversely disposed pivoted bar for setting a spring member in a predetermined relation in respect to the pivoted bar for holding the latter in a retained position to prevent accidental displacement of the anvil relative to the base.

The invention has as a further object the provision of a shiftable anvil having a carriage mem- 40 ber bodily Vmovable therewith and cooperating with an extension of a transversely disposed pivoted bar to oscillate a U-'shaped spring which serves to hold the bar in a selected and retained position.

45 Other objects, advantages and features of the invention will appear from the detailed description when considered in the light of the accompanying drawing in which:

Fig. 1 is a perspective View of a stapling ma- 50 chine showing the anvil according to the invention in position to deform a staple for permanent fastening.

Fig. 2 is a fragmentary sectional View taken on `the line 2 '2 of Fig. 1. 55 Fig. 3 is a fragmentary view of Fig. 2 Shown on Va larger scale but illustrating the anvil shifted to deform a staple for temporary fastening.

Fig. 4 is a sectional view on the line 4 4 of Fig. 2. n

Fig. 5 is a plan view of a fragmentary portion 5 of the base of the stapling machine.

' Fig. 6 is a bottom view of Fig. 5.

Fig. 7 is anA exploded or disassembled view i1- lustrating the anvil and the retaining mechanism cooperating therewith and l0 Fig. 8 is afragmentary side view of Fig. 1 but shown on a largerscale.

Referring `to the drawing, the anvil lil is slidably mounted on the base Il of a stapling machine generally designated l2 which comprises 15 an appropriately pivoted arm I3 suitably supporting a conventional staple strip (not shown) whereby av U shaped staple M of the staple strip may be advanced`Y by a spring actuated follower l5 to the forward part of the arm and in regis- '20 tration with a vertically disposed staple receiving raceway l through which a registered staple is Vslidably displaced downwardly by a blade I6 carried by a reciprocable plunger l'i onto several papers or the like (not shown). to `be anchored or fastened together. This fastening is done more particularly by the depending legs of a conventional U shaped staple which are passed through the papers to be anchored onvthe downward displacement of blade l t' until they enter the spaced 30 indentations or relatively elongated recess i8 and I9 for temporary fastening or the transversely disposed relatively elongated indentation or recess 26 for permanent fastening depending whether the. anvil Hl is set for temporary or permanent crimping or deforming of a staple.

Anvil lll is in the form of rectangularly shaped plate having knurled marginal portions 2l' to facilitate the gripping thereof by finger pressure. The anvil is slidably mounted and guided in a relatively shallow recess 2l formed in the base. Il. The height of the anvil is slightly greater than the depth of recess 2l and consequently the upper portion ofthe anvil projects beyond the upper surface of base Il.

. Rigidly attached to the bottom face of anvil l0 by rivets or pins 22 is a carriage 23 which comprises spaced horizontal walls 2d and 25 carrying depending sides 25 and 2l from each of which laterally extends a flange 28.

Upper spaced walls 24 and 25 of the carriage together with the depending walls 21 and 28 constitute a rectangular shaped head slidably guided in a longitudinally disposed opening 29 inthe bottom wall 3l] of recess 2l and the spaced later- 55 ally extending wings or flanges 28 cooperate with the lower face of wall 30 adjacent opening 29 to prevent disengagement of the slidable anvil from recess wall 30.

The spaced walls 24 and 25 of the head of the slidable carriage 23 define a centrally disposed opening or gap 3| in registration with opening 32 of the anvil and a tongue or extension 33 of a pivoted bar 34 projects through elongated opening 3l of the carriage andr into opening 32 of the anvil.

The pivoted bar 34 includes a centrally arranged reduced portion 35 from which tongue 33 projects. The upper faces of the reduced portion or shoulders 35 are each provided with inclined faces 36 and 31 converging to form an apex or relatively sharp edge 38 on which the base 39 of the U shaped spring 4I) is supported.

Tongue 33 also passes through an opening 4I in base of spring 40 which embodies spaced and diverging arms 42 and 43 having their terminals 44 closely confined in the spaced openings or sockets 45 and 45 in the upper wall of the base II.

Integral with bar 34 and extending laterally from each side thereof is an overhanging lug 41 each of which includes beveled faces 48 and 49 forming a downwardly and longitudinally disposed apex or relatively thin edge 50 seated at the lowermost portion or apex of a V shaped fulcrum bearing or groove 5I having diverging faces 52 and 53 formed in the spaced longitudinal depending sides 54 and 55 of the base II. More specifically each of the spaced sides 54 and 55 is provided with an opening 56 in which a lug 41 extends, each opening 56 communicating with a V shaped groove or bearing 5I in which a knife edge 50 is rockably seated. It will be noted that the lower part 51 of the bar 34 has a width coeXtensive with the distance between the spaced sides 54 and 55 of the base and hence side faces 58 of the bar cooperate with the spaced sides of the base to prevent transverse or lateral displacement of the bar.

The knife edges 5I] of the bar 34 are seated on substantially corresponding shaped knife edges of the bearings 5|, the longitudinally disposed apices of the latter serving as fulcrum means on which bar 34 may be selectively rocked in a direction towards the front or rear portion of the anvil, that is to say, lugs 41 have a pivotal connection with the spaced sides of the base II.

In Figs. 1 and 2, anvil I0 is illustrated as occupying the entire front portion of shallow recess 2|. In such position of the anvil permanent crimping indentation 2i) thereof is in alinement with the raceway I6 of course after arm I3 has been depressed. Consequently, after plunger I1 has been actuated staple I 6 is driven out of raceway I4, the legs of the staple, however, first penetrate through several papers to be anchored after which the legs of the staple come in contact with walls of indentation 20 and the latter cooperates to deform the legs of the staple to permanently anchor the papers together.

Where it is desired to anchor several papers by a staple temporarily, the operator first applies slight pressure on a knurled marginal portion 2I or on any front portion of the anvil but exerted in a rearward direction and consequently the anvil is slidably shifted in a direction towards the rear of the base. If anvil I0 be displaced, extension 33 is actuated and accordingly bar 34 is rocked so that spaced edges 50 pivot on their fulcrum bearings, that is, the lupper portion of the bar swings rearwardly and assumes the position illustrated in Fig. 3 and in such position indentations I8 and I9 of the anvil are utilized for deforming a staple for temporary fastening. The rearward or forward tilting of bar 34 is controlled by the movement of the anvil which is stopped in its travel by the forward or rearward transverse walls of recess 2 I, that is, the extreme limits of the swing of the bar 34 takes place at a time when the anvil strikes or abuts either the front or rear transverse walls of recess 2I which serves as stop means for the anvil.

During rearward displacement of the anvil, bar 34, of course, is actuated and tilts towards the rear of the base. In tilting rearwardly, U shaped spring 4D is also actuated to retain or hold the bar when in an extreme position thereof to prevent accidental displacement of the anvil. More particularly, when the bar is swung, edges 38 actuate spring 40, causing the arms 42 and 43 of the latter to swing in the same direction relative to the base although the terminals 44 of the spring are continuously retained in their respective sockets 45, and 45. Hence, by reason of the resiliency of the spring, base 39 maintains a downwardly directed pressure against inclined faces 36 adjacent apices 38 and consequently bar 34 is prevented from accidentally swinging forwardly. It follows therefore that after the anvil is shifted to a selected position it must be deliberately actuated to another selected position.

Accordingly, in the position of the anvil for temporary fastening of papers, (see Figi. 3) the anvil occupies the entire rear portion of recess 2|, the bar is in a position tilting towards the rear of the base II, and the retaining spring is also tilted, lnclining towards the rear of the machine but holding the bar in a retained or set position.

Having completed temporary fastening, the anvil may be readily adjusted for permanent fastening. By a slight nger pressure exerted on the anvil the latter may be quickly slidably displaced towards the front of the recess 2l. In moving forwardly, extension 33 is struck causing pivoted bar 34 to swing through the dead center and subsequently move to incline or tilt towards the front of the machine until its movement is resisted when the forward transverse face of the anvil strikes or abuts the forward transverse wall of recess 2I. However, during the swing of the bar, spring 40 has also been v actuated or swung, that is, oscillated by reason of rectilinear edges 38 which are continuously in close engagement and cooperate with base 39, swinging the latter in a direction towards which the bar has been displaced and consequently base 39 of spring 49 is also in an inclined posi.- tion and tilting in a direction towards the front of the machine. That is to say, when the anvil has been set for permanent fastening, base 39 due to the pressure imparted thereby cooperates with face 31 to prevent accidental displacement of the bar and hence the anvil is prevented frorn displacement towards the rear of the machine. Base 39 is continuously in contact with apices 38 by reason of the downward pressure imparted thereto by the arms 42 and 43 which may be considered as having their terminals pivotally sustained in the spaced sockets 43.

By the expression to prevent displacement of the anvil as set out in the Specification and claims, it is to be understood, shall mean, involuntary or accidental displacement of the anvil relative to the base after having stopped in either its forward or rearward extreme posi- 110 my invention defined in the appended claims.

. I claim:-

` 1. In a stapling machine, a base having a horizontally shiftable unitary anvil comprising spaced elongated staple deforming indentations,

means pivoted to said base and adapted to be actuated by said anvil during displacement of said anvil longitudinally of said base, and means cooperating with said pivoted means to prevent accidental displacement of said anvil.

2. In a stapling machine, a base having a rectilinearly shiftable anvil comprising several types of elongated clinching indentations, swingable means disposed transversely of said base and actuated upon shifting of said anvil, means to limit rectilinear movement of said anvil for limiting the movement of said swingable means and means for retaining said swingable means at the completion of movement thereof to prevent displacement of said anvil.

3. In a stapling machine, a base having a shiftable anvil comprising several types of spaced and elongated clinching indentations, a

transversely disposed member pivoted to said base, and spring means tiltable relative to said base and cooperating with said member to retain said anvil in a predetermined position.

4. In a stapling machine, a base having a rectilinearly and horizontally shiftable anvil, a bar extending transversely of and pivoted to said base and actuated during movement of said anvil longitudinally of said base, and spring means in part seated on and actuated by said bar and cooperating therewith to prevent movement of said anvil from a set position thereof.

5. In a stapling machine, a base comprising a recess, an anvil disposed in said recess and-rectilinearly displaceable therein longitudinally of said base, a transversely disposed bar tiltable relative to said base and bodily swingable during movement of said anvil, and spring means in part seated on and cooperating with said bar and in part cooperating with said base. to prevent displacement of said anvil.

6. In a stapling machine, Va base comprising Va recess, an anvil slidably disposed in said recess and rectilinearly guided therein longitudinally of said base, means tiltably supported by said base and actuated by said anvil during displacement thereof, and spring means tiltably actuated by said tiltable means and cooperating therewith to prevent displacement of said anvil;

7. In a stapling machine, a base having a horizontally movable slidably guided anvil, a transversely disposed bar having means tiltably carried by said base and actuated by horizontal movement of said anvil, and swingable springl means tiltably actuated by said bar to prevent movement of said anvil.

8. In a stapling machine, a base having a slidably guided anvil, a bar having ends supported by said base, a spring having a portion seated on said bar and including means retained by said base, said anvil being rectilinearly and rearwardly displaceable upon the application of iinger pressure thereon and means to limit rearward displacement of said anvil, said spring upon stopping ofr said anvil cooperating withsaid bar to prevent displacement of .said anvil.

9. In a stapling machine, a base having a slidably guided anvil, a bar having ends tiltably supported by said base, a spring having a portion seated on said bar and including arms retained by said base, said anvil being rectilinearly and forwardly displaceable upon the application of linger pressure thereon, and means to limit forward displacement of said anvil, saidV spring upon .stopping of said anvil cooperating with said bar to prevent displacement of said anvil.

10. In a stapling machine, a base having a slidably.. guided anvil comprising several types of staple deiorming indentations, a bar having spaced ends tiltably supported by said base and comprising means cooperating with said anvil to tilt saidbar upon rectilinear movement of said anvil, said base having means cooperating with said anvil to limit rectilinear displacement of said anvil, and swingable spring means cooperating with said bar and retained by said base to prevent displacement of said anvil.

l1. In a stapling machine, a base having a slidably and rectilinearly guided anvil comprising severalitypes of staple deforming indentations, said base having means to stop forward or rearward `displacement of said anvil, tiltable means adapted to be actuated by said anvil and having ends pivotally carried by said base, and spring means cooperating with said tiltable means for holding said anvil against displacement when disposed in a stopped position.

12. In a stapling machine,-a base having a slidably guided anvil, a transversely disposed bar having Vends tiltably 'supported by said base, means 'upon rectilinear displacement of said anvil cooperating to tilt said bargand a spring seated on said' bar and having arms retained by said base,` said anvil having means cooperating 'with said base to limit forward or rearward displacement of said anvil, said spring cooperating to retain said bar in an extreme forward or rearward' position Yof said anvil to prevent displacement of the latter.

13.A In a stapling machine, a base having a slidably guided anvil, a transversely disposed bar having V shaped ends each having a bottom edge tiltablysupported by said base, means upon rectilinear displacement of said anvil cooperating to tilt saidV bar, and a U shaped spring comprising arms retained by said base and a member common to said arms seated on said bar and actuated by the latter for tilting said spring to retain said bar and hold said anvil against displacement.

- 14. In a stapling machine, a base having a slidably guided anvil, a transversely disposed tiltable bar` adapted to be actuated by said anvil and having V shaped ends, said base having V shaped bearings for tiltably retaining said ends, means to limit forward or rearward displacement of said anvil, and spring means actuated in response to the displacement of said bar and cooperating therewith in a stopped position of said anvil to prevent displacement thereof.

15. In a stapling machine, a base having a slidably `guided anvil comprising several types of staple deforming indentations, a bar actuated by said anvil and comprising V shaped ends, said base having V shaped bearings tiltably supporting said ends, means to limit forward or rearward rectilinear displacment of said anvil longitudlnally of said base, and tiltable spring means operatively sustained by said base and displaceable in response to the movement of said bar and cooperating therewith in a stopped position of "5 said anvil to prevent displacement of the latter longitudinally of said base.

16. In a stapling machine, a base having spaced V shaped openings, a bar comprising ends tiltably sustained in said openings, an anvil adapted t be shifted upon the application of pressure thereon to actuate said bar, and a U shaped spring swingable in response to the displacement of said bar and cooperating therewith to prevent displacement of said anvil.

17. In a. stapling machine, a base comprising a recess, an anvil slidably guided in said recess, means to limit forward or rearward movement of said anvil, transversely disposed means tiltably carried by said base and swingably dis- 20 placed upon displacement of said anvil and a spring actuated by said tiltable means cooperating with the latter to prevent displacement of said anvil when disposed in a normally forward or rearward position.

18. In a stapling machine, a base having a horizontally shiftable anvil movable over the upper face thereof, tiltable retaining means adapted to be actuated by said anvil, stop means to limit displacement of said anvil, and spring means for retaining said tiltable means to prevent shifting of said anvil.

19. In a stapling machine, a base having a shiftable anvil, tiltable means actuated in response to the rectilinear displacement of said -3'5 anvil, stop means to limit forward or rearward rectilinear displacement of said anvil relative to said base, and swingable spring means cooperating with said tiltable means to prevent displacement of said anvil when disposed in a normally forward or rearward position.

20. In a stapling machine, a base having a horizontally and slidably guided anvil comprising several types of elongated staple clinching indentations, a transversely disposed bar having ends pivotally sustained by said base, said anvil having means for actuating said bar and a spring contacting said bar and including spaced arms movably retained by said base, said anvil being rectilinearly displaceable upon application of nger pressure thereon, said base having means to limit rearward displacement of said anvil, said spring upon stopping of said anvil cooperating with said bar to prevent displacement of said anvil.

21, In a stapling machine, a base having a longitudinally displaceable anvil comprising several types of staple clinching indentations, a transversely disposed bar having V shaped ends tiltably mounted on said base and means operatively associated with said anvil whereby upon displacement of the latter longitudinally of said base said bar is tilted towards the direction of izontally displaceable anvil comprising several types of staple clinching indentations, a transversely disposed bar having V shaped ends tiltably mounted on said base and means adapted to be actuated by said anvil whereby upon displacement of the latter longitudinally of said base said bar is tilted towards the direction of movement of said anvil, said bar having laterally disposed shoulders each including fulcrum means, and a spring seated on said fulcrum means and retained by said base to prevent displacement of said anvil.

23. In a stapling machine, a base having a horizontally displaceable anvil comprising several types of staple clinching indentations, a transversely disposed bar having V shaped ends tiltably mounted on said base and means adapted to be actuated by said anvil whereby upon displacement of the latter longitudinally of said base said bar is tilted in the direction of movement of said anvil, said bar having shoulders each including beveledv fulcrum means, and a U shaped swingable spring having its intermediate portion seated on and urged against said fulcrum means and comprising spaced arms operatively sustained by said base.

24. In a stapling machine, a base having a horizontally displaceable anvil comprising several types of staple clinching indentations, a transversely disposed bar having V shaped ends tiltably mounted on said base and means adapted to be actuated by said anvil whereby upon displacement of the latter longitudinally of said base said bar is tilted in the direction of movement of said anvil, said bar having shoulders each including beveled portions each having edge fulcrum means, and a swingable spring having its intermediate portion urged against said edge fulcrum means and seated thereon and comprising spaced arms operatively sustained by said base to prevent displacement of said anvil.

25. In a stapling machine, a base having a horizontally Iand rectilinearly displaceable anvil comprising several types of staple clinching indentations, a transversely disposed bar having V shaped ends tiltably mounted on said base and means adapted to be actuated by said anvil whereby upon displacement of the latter longitudinally of said base said bar is tilted in the direction of movement of said anvil, means to limit forward or rearward rectilinear displacement of said anvil, said bar having shoulders each including fulcrum means, and a swingable spring seated on said fulcrum means and retained by said base for holding said bar in a stopped tilted position.

STEPHEN A. CROSBY. 

